This function returns the Ahnentafel number
linking a person and his ancestor.
Minimum FH Version:
No. of Parameters:
A reference to an Individual
A reference to an Individual (a possible ancestor
of the first individual).
One individual can be an ancestor of another,
more than once, and consequently have more
than one ahnentafel number for them. This
parameter allows you to specify whether the
number you want is for the closest relationship
binding the 2 people, the 2nd closest
relationship, the 3rd closest relationship, or
Use a value of 1, here, to represent the closest
relationship, 2 to represent the 2nd closest, and